Red Hat Bugzilla – Bug 242018
Anaconda generates a false warning during network configuration
Last modified: 2007-11-30 17:12:05 EST
Description of problem:
I've just used an nfs install to upgrade to F7. As part of this I had to
configure a network interface.
In the netmask section the prompt specifically states that you can use either
dotted quad or single figure notation to specify the netmask. However when I
tried to use the dotted quad notation (255.256.248.0) I got an error message
popup which said "Prefixes must be between 1 and 32 bits for IPV4. Please try
again". Using 11 as the netmask worked.
If you continue ignoring the warning then you can move on in the installation (I
didn't check whether this actually worked though), so it's probably just a
Version-Release number of selected component (if applicable):
Default anaconda with F7
Steps to Reproduce:
1. Boot rescue CD and select NFS install (possibly others too)
2. In the network config use dotted quad notation for netmask
Error message saying the netmask is invalid
(In reply to comment #0)
> Description of problem:
> I've just used an nfs install to upgrade to F7. As part of this I had to
> configure a network interface.
> In the netmask section the prompt specifically states that you can use either
> dotted quad or single figure notation to specify the netmask. However when I
> tried to use the dotted quad notation (255.256.248.0) I got an error message
That's not a valid netmask. A /11 network would be 255.224.0.0 in IPv4 netmask
The 256 was a typo in the original bug report, our netmask is 255.255.248.0
which is a valid netmask and did produce the warning from anaconda.
I also managed to get the single digit mask wrong (counted from the wrong end!).
It should probably be /21? This was the first time I've had to work out that
value rather than use the quad notation.